hydronium


Also found in: Dictionary, Acronyms, Encyclopedia, Wikipedia.

hydronium

 [hi-dro´ne-um]
the hydrated proton H3O+; it is the form in which the proton (hydrogen ion, H+) exists in aqueous solution, a combination of H+ and H2O.

hy·dro·ni·um ion

the hydrated proton, H3O+, a form in which hydrogen ion exists in aqueous solutions; also, H3O+·H2O, H3O+·2H2O, etc.
Synonym(s): oxonium ion
References in periodicals archive ?
Caption: Figure 4: Electrochemical results obtained with three-electrode cells for the monolith ACF25-M: (a) cyclic voltammetry recorded at 0.1 mV [s.sup.-1] in the total voltage range and in the voltage ranges for [H.sub.3][O.sup.+] and HS[O.sub.4.sup.-]: (b-d) galvanostatic plots obtained at 1mA [cm.sup.-2]: (b) for both ions in the total voltage range; (c) for the hydronium ion; and (d) for the bisulfate ion.
The main chemical reaction on the cathode is the reduction of hydronium that leads to the water release and hydrogen evaluation:
Monochloramine + Oxidized Site on the Activated Carbon Surface + Water [right arrow] Nitrogen + Hydronium Ion + Chloride Ion + Activated Carbon Surface
A low pH indicates a high concentration of hydronium ions, while a high pH indicates a low concentration.
The columns used were: (1) Cation trap column CS12A high efficiency cation-exchange resin in the hydronium form, (4 x 250 mm) analytical.
There is also important to understand the dynamics involved in the reaction in the sorbentsolution interface, which should consider interactions such as ion exchange, surface hydrolysis, hydration, competing exchange reactions between metal ions in solution and free hydronium ions ([H.sup.+]).
Hydrogen sulphide also reacts with water molecules to form hydronium, again a highly- acidic substance," Sudhir Khera, an engineer, said.
This is because of the increased surface conductivity resulting from hygroscopic-induced moisture absorption, which is intensified by "hydronium" ions dissociated from the activators; malfunctions and assembly failures are the result.
DeSimone said that his polymer, with its "sea of acid groups" can take the heat and its conductivity isn't dependent on the presence of a hydronium.
The procedure involves spraying water in the presence of an electric field, causing water molecules to become positively charged "hydronium ions," which contain an extra proton.
High pressure, densified atom makes "phase-changed," new substance & H, hydronium ion.